Anyone with a Rev/Hard Manifold ever have any problems??

[The All Mighty KA-T]

i've just bought a Rev/Hard Manifold and i just wanted to know if there are any problems that some of you rev/hard owner have come across and wouldnt mind letting me know.............thanks

[chmercer]

master cylinder clearance

[Craving4Boost]

get a turbo with a ON CENTER turbine housing or else you're going to have to do some modifications. a straight T04B is a good turbo for the rev hard

[C-Kwik]

The revhard is prone to cracking if you don't prep the manifold. Couple thing I did to mine when I had one:

1. Cut the head flange so that each port has it's own flange. The flange stays cooler than the runners and expands less. Cutting the reliefs between the ports will allow the runner sections of the mani to expand without putting stress on the joints.

2. Remove all flash castings. Not a huge concern, but typically, if it will want to crack, it will want to start at a sharp point somewhere. A dremel or drill mounted grinder bit will make this easy.

3. Drill out the head flange stud holes. They should become slightly bigger as you move to the outer most holes. As the manifold gets hot, it will want to expand it's overall size. The heads will expand as well, but not as much as the manifold as the heads will stay cooler overall. If the manifold expands more than the studs from the head to the mani will let it, it may shear the stud off. It could contribute to cracking, but it's likely the stud will break first.

These are actually good preventative tips that would apply to all manifolds. But the revhards are known to crack without good prep. I had got my XS Engineering kit used and the mani came with a nice crack in it. Tried having it fixed, but that only lasted 6 or so months until it cracke3d again and even worse than it was before. My second revhard had all the prep I mentioned and it worked flawlessly.

[Craving4Boost]

what about low boost? im planning to only boost 8psi..should it be ok? if not then...sigh...guess it has to come off

[Craving4Boost]

what can cut through cast iron? that sh*t looks tough! will i have to use a flame torch or something

[The All Mighty KA-T]

the manifold is cast iron....... do i really have to worry about warping or cracking......i'm not talking about a SSA manifold........lol
Modified by The All Mighty KA-T at 6:26 AM 3/25/2006

[S14tat]

i cracked my first rev hard in a one year or 20K miles and my second rev hard is well prepped like how C-kwik said and it hasn't cracked in the last 2 years.

[SeanC]

a normal 4.5" grinder with an 1/8" cut-off wheel will work fine for relief cutting. or an air grinder.

[lrb_2000]

are the clearance issues only on the s14 because of the MC being different? Because I have the revhard and I was going for the turbonetics t3/t4 from jgstools on my s13, but that not be a good idea..?

[Structure240sx]

i preped my revhard just like ckwick mentioned over 3 years ago and 30,000+ miles with over 500rwhp, no issues

[The All Mighty KA-T]

get a turbo with a ON CENTER turbine housing or else you're going to have to do some modifications. a straight T04B is a good turbo for the rev hard

Anyone got a pic of a turbo with a ON CENTER TURBINE HOUSING??

I'm going with a Turbonetics T3/T4.....will it work with the manifold?

[Structure240sx]

my pt61 on-center



tangential turbo

[nismojunkie]

what do you mean an "on center" turbo

[PencilShavings]

look at the 2 pics structure just posted, you'll see one the turbine flange is in the center of the turbine housing, while the bottom pic the flange is offset

[C-Kwik]

It's a bit easier to see in these pics:

on center:

Notice the center of the turbine inlet flange lines up with the center axis of the turbine.

tangential:

Note the turbine inlet flange is of to the side.

[nismojunkie]

besides clearance issues in some cases, is one better than the other? sorry for the thread jack, im just curious.

[Structure240sx]

tangentials flow better than on-centers making a more effiecent and usually more powerfully setup

[The All Mighty KA-T]

but do you really have to have a on center turbo or can you use both?i'm not sure that turbonetics has a on center turbo.....but ill have to look into that.......thats why i was asking.

P.S. Thanks C-Kwik and Structure for the pics and good explanation......

[nismojunkie]

ya, thanks for explaining that.

[yashin]

but do you really have to have a on center turbo or can you use both?i'm not sure that turbonetics has a on center turbo.....but ill have to look into that.......thats why i was asking.

P.S. Thanks C-Kwik and Structure for the pics and good explanation......

check out orion's post

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